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The position vector of a particle R as a function of time is given by...

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The position vector of a particle R as a function of time is given by 7 R 4 sin 2nt 4 cos 2nt j where R is in metre t is in seconds and i and denote unit vectors along x and y directions respectively Which one of the following statements is wrong for the motion of particle a Acceleration is along R b Magnitude of acceleration vector is v R where v is the velocity of particle e Magnitude of the velocity of particle is 8 m s Both of the particle is a circle of radius 4 m

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